# `GSPluginHandler.filterClasses`

*Instance Property*

Array of classes conforming to the `GlyphsFilter` protocol.

## Declaration

```swift
var filterClasses: NSMutableArray { get set }
```

```objc
@property (strong) NSMutableArray<Class> * filterClasses;
```

```python
filterClasses() -> list[type]
setFilterClasses_(filterClasses: list[type])
```